/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup;
import android.widget.LinearLayout;

/**
 * {@link android.view.View#requestFocus(int, android.graphics.Rect)} and
 * {@link android.view.View#onFocusChanged(boolean, int, android.graphics.Rect)}
 * work together to give a newly focused item a hint about the most interesting
 * rectangle of the previously focused view. The view taking focus can use this
 * to set an internal selection more appropriate using this rect.
 * 
 * This Activity excercises that behavior using three adjacent
 * {@link InternalSelectionView} that report interesting rects when giving up
 * focus, and use interesting rects when taking focus to best select the
 * internal row to show as selected.
 * 
 * Were {@link InternalSelectionView} not to override
 * {@link android.view.View#getFocusedRect}, or
 * {@link android.view.View#onFocusChanged(boolean, int, android.graphics.Rect)}
 * , the focus would jump to some default internal selection (the top) and not
 * allow for the smooth handoff.
 */
public class InternalSelectionFocus extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		final LinearLayout layout = new LinearLayout(this);
		layout.setOrientation(LinearLayout.HORIZONTAL);
		layout.setLayoutParams(new ViewGroup.LayoutParams(
				ViewGroup.LayoutParams.MATCH_PARENT,
				ViewGroup.LayoutParams.MATCH_PARENT));

		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0,
				ViewGroup.LayoutParams.MATCH_PARENT, 1);

		final InternalSelectionView leftColumn = new InternalSelectionView(
				this, 5, "left column");
		leftColumn.setLayoutParams(params);
		leftColumn.setPadding(10, 10, 10, 10);
		layout.addView(leftColumn);

		final InternalSelectionView middleColumn = new InternalSelectionView(
				this, 5, "middle column");
		middleColumn.setLayoutParams(params);
		middleColumn.setPadding(10, 10, 10, 10);
		layout.addView(middleColumn);

		final InternalSelectionView rightColumn = new InternalSelectionView(
				this, 5, "right column");
		rightColumn.setLayoutParams(params);
		rightColumn.setPadding(10, 10, 10, 10);
		layout.addView(rightColumn);

		setContentView(layout);
	}

}
